W32/SillyFD-AA worm targets removable drives

Companies are being warned of a worm that spreads by copying itself onto removable drives such as USB memory sticks, and automatically runs when the device is next connected to a computer.

Internet security firm Sophos said the W32/SillyFD-AA worm hunts for removable drives, such as floppy discs and USB memory sticks, and then creates a hidden file called autorun.inf to ensure a copy of the worm is run the next time it is plugged into a Windows PC.

It also changes the title of Internet Explorer windows to append the phrase "Hacked by 1BYTE".

Graham Cluley, senior technology consultant at Sophos, said, “With a significant rise in financially motivated malware, this type of worm could be an obvious backdoor into a company for criminals bent on targeting a specific business with their malicious code."

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